膨ぼう張ちょう係けい数すう

noun

coefficient of expansion

Technical term used in physics and engineering to describe how much a material expands per degree of temperature change. Often used in contexts like thermal expansion.

See also: 膨張率

• この材ざい料りょうの膨ぼう張ちょう係けい数すうは非ひ常じょうに小ちいさい。

  The coefficient of expansion of this material is very small.

• 温おん度どが上あがると、膨ぼう張ちょう係けい数すうに応おうじて長ながさが変かわる。

  When the temperature rises, the length changes according to the coefficient of expansion.